Y©B8C4 cluster: a boron-carbon molecular wheel with dodeca-coordination number in plane

Computational evidence is reported for the largest planar molecular wheel of the Y (c) B8C4 cluster, featuring an yttrium atom enclosed by a highly symmetric B8C4 ring. The B8C4 ring is viable in the -(BCB)(4)- form with double 9 pi/10 sigma aromaticity. The centered yttrium atom is dodeca-coordinated with the peripheral B8C4 ring, which sets a record coordination number for a planar structure in chemistry heretofore.

Automated summary

Computational evidence is presented for the existence of the largest planar molecular wheel composed of an yttrium atom surrounded by a highly symmetric B8C4 ring. The B8C4 ring exhibits double 9 pi/10 sigma aromaticity in the -(BCB)(4)- form. The yttrium atom at the center is dodeca-coordinated with the peripheral B8C4 ring, setting a new record for the coordination number in a planar structure.